Using wireless video

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Rickles

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#223894 23-Oct-2017 11:26

As an easy means to get my TV recordings from one room to another where the main TV is, I am trying to use a wireless video sender/receiver set up.

The picture is pretty good (5.8GHz and selectable channels), but getting loud buzzing noise over TV speakers.

Have tried moving all the obvious devices that might cause such interference, and the buzzing is louder on one channel more than the other ... it's a composite video with L/R audio using RCA plugs.

It may be my imagination, but the buzzing seems to vary as I wave the TV remote about

Anyone encountered this problem? Suggestions (be nice ) would be appreciated.

Tks.

richms

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#1888030 23-Oct-2017 11:36

I have in the distant past tried one of the 5.8GHz senders, and the audio had problems with video content when it was bright. Seems the video signal was over spec strength and was stuffing it up. It was a cheap set I got from DSE a long time back, well before they started selling stuff off from being broke.

I used it to send an old CCTV DVR to another screen. When I put an RCA splitter on the output of the unit and had it driving both the sender and a local TV then it tamed the level down enough that it stopped with the buzz.

Richard rich.ms

Rickles

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#1888038 23-Oct-2017 11:55

Rich ... tks for that ... might try some loading along those lines.

I know the TV is otherwise fine because I tested using a media player with RCA L/R cables.

sbiddle

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#1888046 23-Oct-2017 12:16

Is it a video sender you purchased in NZ?

Rickles

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#1888047 23-Oct-2017 12:29

>Is it a video sender you purchased in NZ?<

Yes ... off TradeMe, but a unit usually sold by Harvey Norman etc ... still has their price sticker and codes on it.

sbiddle

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#1888053 23-Oct-2017 12:36

Rickles:

>Is it a video sender you purchased in NZ?<

Yes ... off TradeMe, but a unit usually sold by Harvey Norman etc ... still has their price sticker and codes on it.

My question was really was a true PAL unit, but it obviously is.

Are you definitely watching PAL content? It's all content and not just one specific video that has issues for example?

Rickles

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#1888058 23-Oct-2017 12:49

>Are you definitely watching PAL content? It's all content and not just one specific video that has issues for example?<

It's the transmission coming directly off a DishTV PVR, so should be PAL.

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Rickles

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#1888071 23-Oct-2017 14:13

Anybody tried these things?

https://www.trademe.co.nz/Browse/Listing.aspx?id=1446468889

richms

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#1888080 23-Oct-2017 14:55

Rickles:

Anybody tried these things?

https://www.trademe.co.nz/Browse/Listing.aspx?id=1446468889

Tried similar looking but black pair off aliexpress for about $17US and it worked sometimes, but was very annoying to get going if either end was powered down, would take a few turn off and on routines to get it sending picture again. Was on a 10m or so pre-made cat 6 patch cable so well within the limits of what they said it should do. Powered one that was about $30US for the pair worked great, and I assume since both ends take power was able to keep its link sorted out even when sources and TVs were powered on and off etc.

Richard rich.ms

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#1888975 24-Oct-2017 21:11

I set up one of those senders for a relative. It worked... sort of. The sound and picture quality degradation was pretty appalling tho.

I also had (I think I still do in a box somewhere somewhere) a low-power UHF transmitter in the 800Mhz band (a Disk Smith purchase from the early 1990s). RCA in, and you could tune any telly in about a 20 metre range to the output. But again, the results were pretty mediocre. I seemed to be able to set it to give an OK picture, or OK sound, but not both at the same time.

Depending on how good your WiFi is, and what your budget is, a video over IP solution might work. I was using a Hauppauge Broadway to do this, with acceptable (from memory) results, sending the output of my Sky box to my bedroom TV, study PC, tablet or phone. But I haven't used it for a while, and I don't know if that or similar units are available. Something like a NextPVR build, with Kodi clients connected over WiFi would probably work quite well. It depends how much time and trouble you want to go to, and how much you want to spend.

Rickles

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#1888986 24-Oct-2017 21:28

Thanks for comments and opinions .... appreciated.

Since I already have an Ethernet cable from NAS to media player atop the TV, I'm going to try PVR HDMI over Ethernet.

richms

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#1889012 24-Oct-2017 22:23

I got some cheap HDMI over IP boxes to try to push the output of the new DVR out to the garage and shed TV's since I only had 1 Ethernet run to both buildings and they trashed the network with broadcast junk that overwhelmed the wifi APs. Had to put them on their own vlan to separate them. If you only have one run of cable you might have problems trying to coexist with your other gear.

Also just because they sell boxes as HDMI over Ethernet doesn't mean they are. Most sold as that are just HDMI over cat 5/6 and do not use Ethernet, instead just dump the 4 data pairs of HDMI on to the 4 pairs of the cat cable. Can't coexist with anything else and won't go thru a switch or whatever.

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Rickles

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#1889024 24-Oct-2017 22:58

Yeah ... I think it's a matter of starting with minimal gear, and then working upwards to see where the acceptable balance is

Rickles

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#1889291 25-Oct-2017 13:41

UPDATE: Just been doing some research, and seems that my Plasma TV is likely to be Iin part at least), source of problem because, in general, they have much greater interference than other types.

This also showed up when I tried using my media player with wifi rather than hard-wire network cable ... quite hard getting wifi lock and distorted images at random times.

SepticSceptic

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#1889801 26-Oct-2017 12:46

You'll need to cover the entire TV in tin foil. This will minimise the interference, and prevent TEMPEST breaches.

However, if you want to watch TV at the same time, you'll be out of luck.

Seriously, I had one of the 2.4Ghz senders, and found that the noise was only on one channel. So I chopped off the offending channel ( at the receiver end RCA plugs), and wired up the good RCA sound channel to two RCA plugs for 2 channel audio. Didnt worry about stereo as it was a small S&V TV in the kitchen.